Caster



FIG. 1 is a perspective view of a caster showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the undisclosed left side being a mirror image;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a cross-sectional view thereof, taken along line 7—7 of FIG. 2; and,

FIG. 8 is a perspective view of a caster showing a second embodiment thereof, it being understood that the only difference from the first embodiment is the broken line element.

The broken lines shown in FIG. 8 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design of a caster, as shown and described. 